Stencil sheet



Patented Apr, 3, 1928.

UNITED STATES SHmJ'IBO HORII, OI KANDA-KU, TORY O, JAPAN. I I

STENCIL swim.

No Drawing.

' My invention relates to improvements in stencil sheets ofthe kind used for duplicating manuscript and type-Jwritten documents, drawings and the like, and consists of a sheet of fibrous material coated orimpregmated with a con'iposition. including esters of polysaccharides and alcohols obtained 'from oils and waxcs'of marine animals, or fishes. The alcohols'preferably used are 1 such as oleic alcohol, selachyl alcohol, and cetyl alcohol. Oleic alcohol (C U G) and sela'chyl alcohol (C H, )-the nameis given by Dr, 'lsujimoto-occur in sperm oil, bottle nose oil and some fish oils and may be isolated from the unsaponiliable matter of the above oils or waxes.

It has previously been proposed to pro-' vide a stencil sheet ofthis kind, such as a base of fibrous paper, coated or impregnated with a composition including a cellulose ester, such as cellulose nitrate or acetate, being dissolved in a volatile solvent, such as amyl acetate, arida tempering agent, suchas castor oil. Such a stencil sheet however has the disadvantage of being stlcky on handling and lacks softness to produce. a .clear,

stencil by the abrasion of a stylus, or by the blow of the type of a type-writing machine. v

According to the present-invention,"the coating of the stencil sheet, including esters of polysaccharides and the alcohols obtained from oils and waxes of marine animals or fishes, forn'|s"a homogeneous mixture which remains soft and flexible unchanged throughout an extended period of time, and produces a clear impression thereon eitheuby the pressure of a hand stylus or the-type of.

a type-writing. machine.

v40 In ,the pragtice of the invention, a sheet-of fibrohs material, such as yoshino paper, is

coated or impregnated with a'compoundprepared by the mixing-together of a solution- -of esters of polysaccharides, such ascellu lose nitrate, cellulose acetateand mannan.

acetate, in a suitable solvent, such as ace tone, methyl alcohol, am-yl alcohol or amyl acetate, with alcohols obtained from marine an'imaloils, or waxes, suchas oleic alcohol,

oil and waxes of marine animals or fishes;

Application filed January 14, 1827. Serial No. 161,247.

selachyl alcohol, with or without a temper mg agent consisting of fatty. or waxy materials such .as-fatty oils, fats, fatty acids,

waxes and naphthene' alcohols. v Naphthene" alcohol is, obtained by naphthen-ic a'lkyl esters being reduced by means of metallic sodium. If desired, instead of the-paper heingcoatcd withthe composition, the latter may be added to the paper stuif in a mixing hollander. 3 v

The proportions of the ingredients of the composition may vary depending o'n'various circumstances, an example being as follows:-- l

ar by weight. Cellulose nitri' te 5 Acetone 20 Methyl alcohol 20' Amyl acetate; 4 0 I Amyl alcohol 15 Oleie aleohol -25 Fatty .oil 3 The term esters of polysaccharides is intended to include not onlyone of definite esters of polysaccharides, but-also a mixture ofthem:

What I claim is: I

1. Stencil sheet comprising a 'base of fibrous material impregnated" with a mix; ture of a solution of esters of polysaccharides in a suitable solvent and 'alcoholsobtain'ed'from oils and waxes of 'n'iarine animals or fishes. a

2. Stencil sheet comprising a base of fibrous material impregnated with a mixture of a solution of esters of polysaccharides in a suitable solvent, aleohols obtained from "oils and waxes of marine' an'imals-or fishes,

and a tempering agent, w

3. Stencil-I sheet comprisinga base of fibrous material impregnatediwith a mixture of a solution of esters of polysaccharides in a suitable solvent, alcohols obtained from and fatty oils. a

In testimony whereof I ailix my signature.

SHINJIRO HoRII. 

